Crusty crud in spark plug well - Kawasaki KLR 650 Forum
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post #1 of 3 Old 12-02-2013, 07:51 AM Thread Starter
2nd Gear
NH Thumper's Avatar
Join Date: Jun 2011
Location: Ashland, NH
Posts: 285
Crusty crud in spark plug well

Can anyone offer any suggestions or recommendations?
I am about to change my spark plug. When I pulled the fuel tank I found the spark plug well was full of debris; stuff that got in and around the cap/boot. I blew it out with compressed air and used a vacuum.
The problem is: itís not loose debris. I think it is just dirt and mud that has now been baked on. I have been trying to scrape it loose. Itís difficult to get down in there. I am planning to try a dental pick this evening.
I am just nervous that I wonít get it all. Itís hard to see down under the lower edge of the plug. Iím nervous that when I unscrew the plug Iíll loosen some un-seen dirt/debris and it will fall into the cylinder.
Anyone had a similar experience?
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post #2 of 3 Old 12-02-2013, 09:50 AM
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a4twenty's Avatar
Join Date: Apr 2013
Location: Ontario, Canada
Posts: 232
maybe back the plug out a couple turns and hit it with the compressed air again?

2013 KLR650
1994 YZ250
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post #3 of 3 Old 12-02-2013, 11:14 AM
Join Date: Nov 2009
Location: Lander, Wyoming
Posts: 6,511
NH Thumper,
Plug the fuel hose and fuel tap vaccum hose, which go the carburetor. Wash with water. There is a Water Drain Hole, just below the thermo-stat Elbow, on the R.H. side of the cylinder head. Chase a piece of baling wire / mechanics wire UP thru it.

Water, scrub, water, compressed air. Get the MUD out. Then loosen the plug, just a Half turn, Spray with carb cleaner / brake cleaner and use the compressed air one more time.

Be certain to Dry out the Inside of the Spark Plug Cap.

Modify at "YOUR OWN RISK"!

Still riding my 1987 KL650-A1. 85,000+ miles & counting
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